Wait a minute--the Northwest Passage was also open in 2004?

A Push to Increase Icebreakers in the Arctic - NYTimes.com

Lawson W. Brigham, chairman of the three-year Arctic Marine Shipping Assessment that is scheduled to be concluded this year, told the gathering that altogether more than 5,400 vessels of 100 tons or larger operated in Arctic waters in the summer of 2004. During that summer there were 102 trips in the Northwest Passage and five complete transits of that legendary route, he said.